IPAMORELIN vs GHRP 6: Research Peptide Guide Loti Labs Ipamorelin and CJC 1295 are almost always discussed together in research circles, and the reason comes down to receptor pharmacology. The two peptides work through entirely different but complementary mechanisms that produce a GHRP and Penis Growth: What the Evidence Actually Shows Molecular recognition of an acyl peptide hormone and activation of ghrelin receptor Nature Communications